UNITED NATIONS (AP) — Secretary-General Ban Ki-moon is urging world leaders to stop fueling the bloodshed in Syria with weapons and get both sides to the negotiating table to end the "biggest challenge to peace and security in the world."

In his annual state of the world address to presidents, prime ministers and monarchs at the U.N. General Assembly on Tuesday, the U.N. chief said the response to last month's "heinous use of chemical weapons" outside Damascus "has created diplomatic momentum — the first signs of unity in far too long."

He called on the U.N. Security Council to adopt an "enforceable" resolution on a U.S.-Russian agreement to put Syria's chemical weapons under international control. He also urged punishment for the perpetrators of last month's chemical weapons attack, possibly at the International Criminal Court.

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